Air bubbles 6 months later...

[StreamlineDesign]

An excerpt from the following PDF:

"Conversely, polycarbonate’s “outgassing” is primarily due to water moisture trapped in an undried sheet. Polycarbonate readily absorbs moisture soon after manufacturing. To remove this moisture, which often interferes with vinyl adhesion resulting in bubbles under the vinyl film, polycarbonate should be dried prior to film application."

https://www.wensco.com/customer/docs/MSC115_Technical Bulletin Outgassing.pdf

 

[ams]

What is FDC?

FDC to me is the Fire Department.

 

[Texas_Signmaker]

An excerpt from the following PDF:

"Conversely, polycarbonate’s “outgassing” is primarily due to water moisture trapped in an undried sheet. Polycarbonate readily absorbs moisture soon after manufacturing. To remove this moisture, which often interferes with vinyl adhesion resulting in bubbles under the vinyl film, polycarbonate should be dried prior to film application."

https://www.wensco.com/customer/docs/MSC115_Technical Bulletin Outgassing.pdf

Thank you for posting this. This explains why I had such bad bubbling when I applied it on a very damp / foggy day. Didn't know poly was hygroscopic